It sounds (to me, at least) like it might be one (or more) of the sensors. If you were to pull the fuse for the ABS (thus disabling the sensors) and everything works well, then (in my opinion) the accumulator valve is not the problem.
Originally Posted by russboyd92grands
I had a bad accumulator valve, and it had simalar symptoms to a bad master cylinder. In fact I replaced the mc 4 times before discovering the real issue.
Good luck. And if pulling the fuse stops the symtoms, it should be okay to leave the fuse out in the mean time to make it safe to drive.
If at first you don't succeed, get a bigger hammer!!
2005 Dodge Grand Caravan SXT (3.8L, purchased at 108,000kms. Now at 166,000km and counting)
1997 Dodge Caravan Rallye (3.3L 242,000kms)
2002 Chevrolet Cavalier (Base Model)
1988 Ford Ranger (2.9L 2wd)
1973 Dodge Cornet Wagon (318 cid)
1965 Rambler Classic 550 4 dr (232 cid)
1966 Rambler Classic 55 Wagon (232 cid)